/* 清除浏览器的默认间距 */

* {
    margin: 0;
    padding: 0
}


/* 清除加粗标签的默认样式 */

b,
strong {
    font-weight: normal
}


/* 清除倾斜标签的默认样式 */

i,
em {
    font-style: normal
}


/* 清除标签的默认下划线样式 */

u,
a {
    text-decoration: none
}


/* 清除列表的默认样式 */

ul,
ol,
li {
    list-style: none
}

.clear-fix::after {
    content: '';
    width: 100%;
    height: 0;
    display: block;
    overflow: hidden;
    clear: both;
    visibility: hidden;
}

.clear:after {
    content: "";
    display: block;
    clear: both;
}